20001200022021 has 12 divisors (see below), whose sum is σ = 27072241348992. Its totient is φ = 13135116423528.

The previous prime is 20001200021983. The next prime is 20001200022079. The reversal of 20001200022021 is 12022000210002.

It is not a de Polignac number, because 20001200022021 - 2⁷ = 20001200021893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20001200021988 and 20001200022006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001200062021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 742586965 + ... + 742613898.

It is an arithmetic number, because the mean of its divisors is an integer number (2256020112416).

Almost surely, 2^{20001200022021} is an apocalyptic number.

It is an amenable number.

20001200022021 is a deficient number, since it is larger than the sum of its proper divisors (7071041326971).

20001200022021 is an equidigital number, since it uses as much as digits as its factorization.

20001200022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485201000 (or 1485200933 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20001200022021 its reverse (12022000210002), we get a palindrome (32023200232023).

The spelling of 20001200022021 in words is "twenty trillion, one billion, two hundred million, twenty-two thousand, twenty-one".